Webster's English Dictionary

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observation

ob.ser.va.tion \.a:b-s*r-'va--sh*n, -z*r-\ \-shn*l, -sh*n-*l\ n [MF, fr. L 
   observation-, observatio, fr. observatus, pp. of (Xobservare 1: an act or 
   the faculty of observing  2a: an act of recognizing and noting a fact or 
   occurrence often involving m easurement with instruments 2b: a record so 
   obtained  3: a judgment on or inference from what one has observed; broadly 
   :  REMARK, STATEMENT obs  4: HEED  5: the condition of one that is observed 
    - observation aj